TWI502223B - Partial random laser illumination system and device having random phase and amplitude component - Google Patents

Description

Partial arbitrary laser illumination system and device with arbitrary phase and amplitude components

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a laser illumination device, and more particularly to a partial laser illumination system and apparatus having an arbitrary phase and amplitude component for suppressing light spots.

Conventional high-coherence laser illumination sources are used in projection systems to produce laser flares on rough screen surfaces, resulting in poor image contrast and irritating viewers. In order to eliminate the aforementioned laser spot phenomenon, a conventional technique is to reduce the laser spot by oscillating the ground glass. Although this prior art can effectively suppress the spot, the laser source cannot be focused to a point because its light source forms a surface light source. In other words, the diffusing element used destroys the original divergence angle of the laser, and the small angle output cannot be maintained ( The divergence angle is about plus or minus 20 degrees), and the penetration rate is only about 50%, so a considerable amount of light energy is wasted. In view of this, the output light source implementing the prior art is only applicable to liquid crystal on silicon (LCOS) or digital light processing (DLP) projector displays, and is not suitable for small angles and small. Micro Electro Mechanical Systems (MEMS).

Another conventional technique is to reduce the laser spot by oscillating periodic diffractive optical elements, which can be used in a microelectromechanical scanning system, but the optical component design is complicated, and the structure must be a perfect periodic structure, resulting in difficulty in production and price deviation. high. Another conventional technique uses arbitrary lightning Random Laser, because the light source is low spatial coherence, the laser source cannot be perfectly focused on one point.

In view of the above problems of the prior art, it is an object of the present invention to provide a partial laser illumination system and apparatus having any phase and amplitude components, which can effectively reduce the contrast value of the laser spot to 8.5% or lower, while The laser beam can be maintained at a small angle and maintains a high transmittance of light, so that the laser beam of the present invention can travel for distances of several meters to several kilometers, and is suitable for liquid crystal 矽-based scanning systems and digital light sources. Processing, MEMS or other scanning systems.

In accordance with the purpose of the present invention, a portion of any laser illumination device having arbitrary phase and amplitude elements is provided, including: a gain medium, an excitation body, a high mirror, and any phase and amplitude elements. The excitation body excites the gain medium electrons from a low energy state to a high energy state; the high mirror is traversed by the gain laser beam emitted by the gain medium; any phase and amplitude elements are interposed between the gain medium and the high reflection mirror, The laser beam is traversed by the gain emitted by the gain medium.

Based on the above concept, the arbitrary phase and amplitude elements are phase-type arbitrary phase and amplitude elements or scattering sub-type arbitrary phase and amplitude elements or a combination thereof, wherein the arbitrary phase and amplitude elements may also be diffusion film elements, diffraction elements, Microlens elements or combinations thereof. The gain medium has a highly reflective surface and an anti-reflective surface. The excitation body drives a laser beam into the highly reflective surface, and the gain-emitting laser beam is emitted from the anti-reflective surface. The arbitrary phase and amplitude elements have an angle with the vertical direction of the post-gain laser beam, the angle being selected from one of approximately ±0 degrees to approximately ±90 degrees. Preferably, the arbitrary phase and amplitude elements reflect a portion of the gain of the laser beam to the gain medium.

Based on the above concept, further comprising a swinging element, the swinging element swinging back and forth For any phase and amplitude component, the direction of the wobble is approximately orthogonal to the direction of the laser beam after the gain or about 0 to 45 degrees. Wherein, the swinging component is selected from one of a voice coil motor, a magnetic moving component, an electric component, a photodynamic component, an acoustic component, and a piezoelectric component, or a combination thereof.

Based on the above concept, one or more optical conversion elements are further included in the gain medium and Between the arbitrary phase and the amplitude element, the light conversion elements are traversed by the gain laser beam emitted by the gain medium. Preferably, a focusing lens is disposed between the light converting elements and the arbitrary phase and amplitude elements such that the laser beam penetrates the focusing lens. Wherein, the light conversion component is selected from a linear or non-linear component, wherein the optical conversion component can be a double frequency component, a frequency component, a difference frequency component or other conversion component.

Based on the above concept, one or more additional phase and amplitude components are added, The additional arbitrary phase and amplitude components are located between the gain medium and the high mirror such that the laser beam penetrates the applied arbitrary phase and amplitude elements.

Based on the above concept, a focus lens is further disposed between the gain medium and the arbitrary phase and amplitude elements such that the laser beam penetrates the focus lens.

In accordance with the purpose of the present invention, a partial arbitrary laser illumination system having arbitrary phase and amplitude elements is also proposed. The invention comprises: a laser illumination device for transmitting a laser beam to the projection target; an arbitrary phase and amplitude component interposed between the laser illumination device and the projection target and traversed by the laser beam. Preferably, the arbitrary phase and amplitude component reflects a portion of the laser beam to the laser illumination device

Based on the above concept, further comprising a diverging lens and a focusing lens, the diverging lens being located between the arbitrary phase and amplitude component and the laser illumination device, the focusing lens being located Between the arbitrary phase and the amplitude element and the projection target, the laser beam penetrates the diverging lens and the focusing lens.

Based on the above concept, one or more additional phase and amplitude components are added, The additional arbitrary phase and amplitude elements are located between the arbitrary phase and amplitude elements and the projection target such that the laser beam penetrates the additional phase and amplitude elements.

Based on the above concept, one or more additional laser illumination devices are further included, the laser The illumination device and the additional laser illumination device emit a laser to a cross dichroic prism to generate a multi-wavelength arbitrary laser source such that the multi-wavelength arbitrary laser source penetrates the arbitrary phase and amplitude element And cast to the projection target.

Based on the above concept, further comprising one or more light conversion elements, the light conversion elements A member is positioned between the laser illumination device and the arbitrary phase and amplitude elements such that the laser beam penetrates the light conversion elements. Or, the light conversion elements are located between the arbitrary phase and amplitude elements and the projection target such that the laser beam penetrates the light conversion elements.

According to the purpose of the present invention, another element having arbitrary phase and amplitude is proposed. Partially arbitrary laser illumination system comprising: a laser illumination device for transmitting a laser beam to a projection target; a plurality of optical conversion modules, wherein each of the optical conversion modules comprises an arbitrary phase and amplitude component and a light conversion The optical conversion module is interposed between the laser illumination device and the projection target and is traversed by the laser beam.

For the purposes of the present invention, it is preferred to incorporate a portion of any laser illumination device having any phase and amplitude components in a portion of any laser illumination system having any phase and amplitude components. The above laser illumination system comprises: any part of the laser illumination device having any phase and amplitude components as claimed in claim 1; an arbitrary phase and amplitude component between the mine The laser beam is traversed by the laser beam between the illumination device and the projection target. Preferably, the laser illumination system further comprises one or more light conversion elements.

In view of the above, a part of any laser illumination system and device having any phase and amplitude components of the present invention can effectively reduce the contrast value of the laser spot to 8.5% or lower while maintaining a divergence angle of a small angle, At the same time, it can maintain high transmittance of light, and is suitable for use in MEMS or small-spot MEMS, or other scanning systems.

1‧‧‧Laser lighting installation

2‧‧‧Divergent lens

3‧‧‧Arbitrary phase and amplitude components

4‧‧‧ voice coil motor

5‧‧‧focus lens

6‧‧‧projection target

7‧‧‧Spot suppression laser lighting device

71‧‧‧Excited body

72‧‧‧ Gain medium

721‧‧‧Highly reflective surface

722‧‧‧Anti-reflective surface

73‧‧‧Arbitrary phase and amplitude components

74‧‧‧ voice coil motor

75‧‧‧High Mirror

76‧‧‧ Launch port

77‧‧‧focus lens

8‧‧‧cross dichroic prism

9‧‧‧Light conversion components

10‧‧‧Light Conversion Module

LS‧‧‧Laser beam

LS1‧‧‧Gas Front Laser Beam

Laser beam after LS2‧‧‧ gain

LSA‧‧‧ fundamental laser beam

LSB, LSC‧‧‧ wavelength converted laser beam

D1~D5‧‧‧ data line

1 is a schematic view of a portion of an arbitrary laser illumination system having an arbitrary phase diffusion film according to a first embodiment of the present invention.

Fig. 2 is a graph showing the effect of the vibration frequency of the voice coil motor of the present invention on the spot suppression effect.

Figure 3 is a schematic illustration of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements in accordance with a second embodiment of the present invention.

Figure 4 is a schematic illustration of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements in accordance with a third embodiment of the present invention.

Figure 5 is a schematic illustration of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements in accordance with a fourth embodiment of the present invention.

Figure 6 is a schematic illustration of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements in accordance with a fifth embodiment of the present invention.

Figure 7 is a schematic illustration of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements in accordance with a sixth embodiment of the present invention.

Figure 8 is a schematic illustration of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements in accordance with a seventh embodiment of the present invention.

Figure 9 is a partial lightning diagram of a seventh embodiment of the present invention having arbitrary phase and amplitude components A schematic diagram of the lighting system.

Figure 10 is a schematic view showing the internal structure of a portion of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to an eighth embodiment of the present invention.

Figure 11 is a schematic view showing the internal structure of a portion of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to a ninth embodiment of the present invention.

Figure 12 is a schematic view showing the internal structure of a portion of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to a tenth embodiment of the present invention.

Figure 13 is a schematic view showing the internal structure of a portion of an arbitrary laser illumination device incorporating a nonlinear crystal or light conversion element device according to an eleventh embodiment of the present invention.

Figure 14 is a schematic view showing the internal structure of a portion of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to a twelfth embodiment of the present invention.

Fig. 15 is a view showing the internal structure of a part of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to a thirteenth embodiment of the present invention.

Figure 16 is a graph of the laser characteristics of a portion of any of the laser illumination devices of the present invention having any phase and amplitude components.

Figure 17 is a schematic diagram showing the far-field distribution of the laser irradiated with arbitrary phase and amplitude elements of the present invention.

Specific examples are given below to explain the contents of the present invention in detail, and the drawings are used as an auxiliary explanation. The symbols mentioned in the description refer to the schema symbols. It is worth noting that the "include" mentioned in the description is an open term and should be interpreted as "including, but not limited to". In addition, those of ordinary skill in the art should understand that the same technical content often has different calling methods, such as "laser" or "laser", so the technical content similar to the same domain and functionally similar in this specification should be Of course, it is included in the scope of this specification.

Please refer to FIG. 1 , which is an arbitrary phase of the first embodiment of the present invention. Schematic diagram of an arbitrary laser illumination system with an external portion of the amplitude element. As shown in Fig. 1, the laser illumination system of the present invention comprises a laser illumination device 1, a diverging lens 2, an arbitrary phase and amplitude element 3, a voice coil motor 4, and a focus lens 5. Among them, the laser illuminating device 1 is generally a device capable of generating and emitting a laser beam, and generally has an energy source for supplying energy to a low level to be an excitation source of high-energy electrons (commonly a semiconductor laser or a thunder) The emitter or the electron excitation source is transmitted through the gain medium (Gain Medium) and the resonant cavity, and the excited light is passed through the gain medium a plurality of times to obtain sufficient amplification, and the amplified light is self-exposed to the laser. The device 1 emits a laser beam LS.

After the laser beam LS passes through the diverging lens 2, it is divergently incident on any phase and amplitude element 3, wherein the diverging lens 2 can diverge the laser beam LS, preferably a concave lens. The arbitrary phase and amplitude component 3 can be any phase and amplitude component of the phase type and the amplitude component or the scattering component, and any phase and amplitude component 3 can have a small angle of approximately ±0 degrees to nearly ±5 degrees (compared to the laser) The vertical direction of the beam LS can even extend to nearly ±90 degrees, with each angle having different suppression spot characteristics. When the laser beam LS crosses any phase and amplitude element 3, the laser beam LS interacts with any phase and amplitude element 3, producing an optical phenomenon that includes at least interference, diffraction, scattering, diffusion, or a combination thereof. Loading any phase and amplitude distribution information into its propagating beam in a time and space manner such that the laser beam LS is incident on the arbitrary phase and amplitude element 3 to achieve its phase and amplitude on the space coordinates and time coordinates. The distribution, and thus the elements that can arbitrarily change the phase and amplitude distribution of the laser beam, are referred to as arbitrary phase and amplitude elements. Next, the laser beam LS passes through the arbitrary phase and amplitude element 3 and enters the focus lens 5, passes through the focus lens 5, and is projected onto the surface of the projection target 6, wherein the focus lens 5 is preferably a convex lens. In other words, any phase and amplitude element 3 is placed in the diverging lens 2 Between the focus lens 5 and the laser beam LS, the laser beam LS is emitted from the laser illumination device 1, and then passes through the diverging lens 2, the arbitrary phase and amplitude element 3, and the focus lens 5, and finally is projected on the surface of the projection target 6. Preferably, the laser beam LS passes through the focusing lens 5 and is focused to a point projected onto the surface of the projection target 6. In this way, the laser illumination system of the present invention can effectively suppress the laser spot noise of the laser beam LS through any of the foregoing phase and amplitude elements 3, and form a part of any laser illumination source. The simple physical mechanism for forming a portion of an arbitrary laser illumination source is that when the laser light passes through any of the stationary phase and amplitude components, the laser beam loads any phase and amplitude information on any phase and amplitude component into its beam, including At least one of the above-mentioned optical interaction phenomena such as interference, diffraction, scattering, and diffusion will occur, and the phase and amplitude fractions on the space coordinates and time coordinates will be redistributed to achieve the spot suppression effect; any phase and amplitude components are oscillated At this time, the spatial distribution of the laser spot changes with the swing position of the component. In a fixed time, the laser spot distribution can re-equally spread the entire illumination surface, thereby achieving a larger spot suppression effect. This includes the original laser phase coherence characteristics and the subsequent addition of some of the spatial and temporal phase and amplitude distribution characteristics of the original laser to form a partial source and amplitude arbitrary distribution of the laser source, referred to herein For some arbitrary laser sources, this laser source does not completely change the spatial coherence and time coherence of the original laser in time and space, but is partially changed, so some of the arbitrary laser sources still retain the original laser part. Propagation characteristics, bandwidth characteristics, collimation and focusing characteristics.

Wherein, when the laser beam LS is incident on any phase and amplitude 3 components, the phase and amplitude of the laser source on the space coordinates and time coordinates are redistributed. When the velocity of the distribution is slow, the phase of the laser beam is penetrated. The amplitude distribution is not completely destroyed on the space coordinates and time coordinates. The laser beam LS after penetration still holds the original mine on the space coordinates and time coordinates. Part of the phase and amplitude characteristics of the beam LS, which has partial spatial coherence, partial temporal coherence, partial arbitrary phase distribution, or / and partial arbitrary amplitude distribution, is called "partially arbitrary". A simple physical mechanism for forming a portion of an arbitrary laser illumination source is that when the laser beam LS passes through the stationary arbitrary phase and amplitude element 3, the laser beam LS adds any phase and amplitude information on any phase and amplitude element 3 to its beam. The optical interaction phenomenon including at least one of interference, diffraction, scattering, and diffusion is generated, and the phase and amplitude fractions on the space coordinates and the time coordinates are redistributed to form part of the arbitrary laser, and reach Spot suppression effect.

In order to make the effect of the present invention more apparent, it is preferable to use the voice coil motor 4 to swing the arbitrary phase and the amplitude element 3 back and forth, and the direction of the oscillation is nearly orthogonal to the direction of the laser beam LS. Swinging the arbitrary phase and amplitude elements 3 redistributes the phase and amplitude of the spatial coordinates and time coordinates of the laser beam again. When swinging the arbitrary phase and amplitude component 3, the spatial distribution of the laser spot changes with the swing position of the component. In a fixed time, the laser spot distribution can re-equally spread the entire illumination surface, thereby achieving time and Partially random lasers with varying spatial variations for greater spot suppression. This includes the original laser phase coherence characteristics and the subsequent addition of some of the spatial and temporal phase and amplitude distribution characteristics of the original laser to form a partial source and amplitude arbitrary distribution of the laser source, referred to herein For some arbitrary laser sources, this laser source does not completely change the spatial coherence and time coherence of the original laser in time and space, but is partially changed, so some of the arbitrary laser sources still retain the original laser part. Propagation characteristics, bandwidth characteristics, collimation and focusing characteristics. In addition, it should be noted that those skilled in the art should of course understand that the voice coil motor 4 is used as a swinging component, however, other swinging components may be used to achieve the same or similar to the voice coil motor 4 when actually implementing the present invention. The swinging effect is not necessarily limited to the use of the voice coil motor 4, and the voice coil motor 4 here is only an implementation aspect. The examples are not limiting, and are described here first.

By swinging the arbitrary phase and amplitude elements 3 back and forth through the voice coil motor 4 described above, a portion of any laser illumination system having any phase and amplitude elements of the present invention can effectively reduce laser spot noise. Please refer to FIG. 2, which is a graph showing the effect of the vibration frequency of the voice coil motor of the present invention on the spot suppression effect, wherein the upper data line D1 indicates the arbitrary phase used and the vertical direction of the amplitude element 3 compared to the laser beam LS. With a small angle of about 1.0 degrees, the lower data line D2 indicates that any phase used is perpendicular (or orthogonal) to the amplitude element LS in the direction of the laser beam LS. As shown in FIG. 2, regardless of whether the arbitrary phase and the amplitude element 3 have a small angular deviation from the vertical direction of the laser beam LS, after the voice coil motor 4 is added to swing back and forth between the arbitrary phase and the amplitude element 3, the voice coil is used. The vibration frequency of the motor 4 rises (from 0 Hz to about 130 Hz), and the laser spot noise ratio (spot contrast value) of the laser beam LS decreases from 30% to 10 to 15%, which shows that the present invention has any Part of the arbitrary laser illumination system of the phase and amplitude components has a good suppression effect on the laser spot noise of the laser beam LS. In addition, the voice coil motor 4 used in the present invention may be a lightweight device with a low voltage requirement, and may have a size of 0.8 cubic centimeters or less and a voltage of 5 V or less, so that the laser of the present invention has any phase and amplitude components. The lighting system as a whole can maintain a low driving voltage while having a small volume without occupying too much space.

The laser illumination system of the present invention having any phase and amplitude components can be applied to red, green, and blue laser illumination systems. If the wavelength range is extended, the arbitrary laser illumination system of the present invention having any phase and amplitude components can be applied to illumination systems of ultraviolet light, visible light, near infrared light, and even far infrared light. In addition, the laser illumination system can be extended to quasi-continuous waves and pulse waves in addition to continuous wave laser illumination systems to form a novel partial phase laser illumination system.

In order to make the effect of the present invention more apparent, it is preferable to design any structural pattern of the upper end of the arbitrary phase and the amplitude element 3 to achieve a higher ability to suppress the light spot. The structural pattern may be a periodically distributed structural pattern or a partially periodically distributed pattern, or an arbitrarily distributed pattern. Structural patterns with a structure pattern of nanometers to micrometers are designed on arbitrary phase and amplitude components. The structure pattern can be a structure pattern of less than 10um to more than 150um, or a smaller pattern or more. Large pattern structure. In accordance with the features of the invention described above, a portion of any of the laser illumination systems of the present invention having any phase and amplitude components can be used in imaging systems or in microscopy systems. The simple physical mechanism for forming the redistribution of the spot pattern is that when the laser light passes through any phase and amplitude component, the laser beam loads any phase and amplitude information on any phase and amplitude component into its beam, including at least one of The above optical interaction phenomena such as interference, diffraction, scattering, and diffusion will occur, and the phase and amplitude fractions on the space coordinates and time coordinates will be redistributed.

In summary, it can be seen that by providing the diverging lens 2, the arbitrary phase and amplitude element 3 (preferably oscillating with the voice coil motor 4), and the focus lens 5 between the laser illumination device 1 and the projection target 6, The invention of a part of any laser illumination system with arbitrary phase and amplitude components can effectively reduce the laser spot noise of the laser beam LS. Since the diverging lens 2, the arbitrary phase and amplitude element 3, the voice coil motor 4, and the focus lens 5 are all disposed outside the laser illumination device 1, it is known that the system can be applied to all laser illumination devices 1 to make their laser spotes The noise is effectively reduced without affecting the existing laser illuminator construction.

Additionally, the laser illumination system of the present invention has many other embodiments. Please refer to FIG. 3, which is a thunder of any phase and amplitude component according to a second embodiment of the present invention. A schematic diagram of the lighting system. As shown in FIG. 3, after the diverging lens 2 and the focusing lens 5 are combined, the incident phase and the amplitude element can be increased in size to enhance the spot suppression capability, and can be used for spot suppression of the point source and the surface source.

In fact, if the diverging lens 2 and the focusing lens 5 are removed, the part of any laser illumination system of the present invention having any phase and amplitude elements still has spot suppression capability. Please refer to FIG. 4, which is a schematic diagram of a portion of an arbitrary laser illumination system having arbitrary phase and amplitude elements according to a third embodiment of the present invention. As shown in Fig. 4, as long as the laser beam LS emitted by the laser illumination device 1 crosses any phase and amplitude element 3, the laser illumination system of the present invention forms part of an arbitrary laser even without a lens group. The light source still has a basic spot suppression capability, so the lens group is only a preferred embodiment of the invention and not a limitation.

The laser illumination system of the present invention may further comprise a plurality of arbitrary phase and amplitude elements and such that the laser beam LS traverses the arbitrary phase and amplitude elements to enhance spot suppression. Please refer to FIG. 5, which is a schematic diagram of a laser illumination system with arbitrary phase and amplitude elements according to a fourth embodiment of the present invention. As shown in FIG. 5, a plurality of arbitrary phase and amplitude elements 3 may be included between the laser illumination device 1 and the projection target 6 (or any arbitrary phase and amplitude elements may be added to the original arbitrary phase and amplitude elements and projection targets). In between, the laser beam LS is traversed through the arbitrary phase and amplitude components to greatly enhance the suppression of the spot. Among them, each of the arbitrary phase and amplitude elements 3 can be combined with the voice coil motor 4 to perform the swing lifting spot suppression effect.

One embodiment of the laser illumination system of the present invention has a plurality of laser illumination devices that collectively emit a laser beam toward a cross dichroic prism. please Referring to Figure 6, Figure 6 is a schematic illustration of a laser illumination system having arbitrary phase and amplitude elements in accordance with a fifth embodiment of the present invention. As shown in Fig. 6, a plurality of laser illumination devices 1 emit a laser beam into the cross dichroic prism 8, and the cross dichroic prism will combine a multi-wavelength laser source as the multi-wavelength laser source. When penetrating any phase and amplitude element 3, any phase and amplitude element 3 will suppress the spot in the multi-wavelength arbitrary laser source and form a multi-wavelength partial laser source to achieve the present invention for multi-wavelength laser sources. Spot suppression effect.

Similar to the above principles, the laser illumination system of the present invention can place one or more light conversion elements on either side of any phase and amplitude elements to form lasers of different wavelengths. Please refer to FIG. 7. FIG. 7 is a schematic diagram of a laser illumination system with arbitrary phase and amplitude elements according to a sixth embodiment of the present invention. As shown in Fig. 7, a light conversion element 9 is provided between the laser illumination device 1 and any phase and amplitude elements 3 such that the laser beam LS emitted by the laser illumination device 1 passes through the light conversion element 9 to generate a basis. The frequency laser beam LSA and the wavelength-converted laser beam LSB, wherein the wavelengths of the converted fundamental-frequency laser beam LSA and the wavelength-converted laser beam LSB are different. After the fundamental laser beam LSA and the wavelength-converted laser beam LSB pass through any phase and amplitude element 3, both spots will be suppressed. Please refer to FIG. 8 again. FIG. 8 is a schematic diagram of a laser illumination system with arbitrary phase and amplitude components according to a seventh embodiment of the present invention. As shown in Fig. 8, the light conversion element 9 between the laser illumination device 1 and any phase and amplitude elements 3 may be plural such that the laser beam LS transmits different wavelengths of laser light through the respective light conversion elements 9. For example, after the first conversion by the first light conversion element 9, the fundamental frequency laser beam LSA is obtained, and after the second conversion by the second light conversion element 9, the wavelength conversion laser beam LSB is obtained, and then transmitted. The third light conversion element 9 performs a third conversion to obtain a wavelength converted laser beam The LSC, after driving the laser beam LSA~LSC into any phase and amplitude component 3, can simultaneously suppress the spot of the laser beams LSA~LSC. In addition, one or more light conversion elements 9 can be placed between any phase and amplitude element 3 and the projection target 6 such that the laser beam LS passes through any phase and amplitude element 3 and then penetrates the light conversion elements 9 At this time, the multi-wavelength laser beam converted by the light is still capable of spot suppression.

Please refer to FIG. 9. FIG. 9 is a schematic diagram of a laser illumination system with arbitrary phase and amplitude components according to a seventh embodiment of the present invention. As shown in FIG. 9, the laser illumination system of the present invention may further include a plurality of optical conversion modules 10, wherein each of the optical conversion modules 10 includes an arbitrary phase and amplitude component 3 and a light conversion component 9, The light conversion module 10 is interposed between the laser illumination device 1 and the projection target 6 and is traversed by the laser beam LS. The first and second portions of the arbitrary phase laser are generated by the first optical conversion module 10, and the second optical conversion module 10 is encountered to generate the third, fourth, and fifth portions of the arbitrary laser. In other words, encountering the Nth optical conversion module 10 can generate a 2+N(N+1)/2 partial arbitrary laser, and so on. Preferably, each of the light conversion modules 10 further includes a voice coil motor 4 such that the voice coil motor 4 swings back and forth between the arbitrary phase and amplitude elements 3 to increase the effect of suppressing the light spot. In addition, in all embodiments of the above system, any laser beam of preferably reflected portion is fed back from the arbitrary phase and amplitude component 3 to the laser illumination device 1 to disturb the laser source on the time coordinate axis and the space coordinate axis. The phase and amplitude distribution are such that a portion of the laser light source with good coherence is formed to form a portion of the arbitrary laser output, which thus produces a spot suppression effect.

Please refer to FIG. 10, which is a schematic diagram showing the internal structure of a laser illumination device having an arbitrary phase and amplitude component according to an eighth embodiment of the present invention. Laser illumination shown in Figure 10 The device is another embodiment of the present invention, which is different from the above-mentioned cavity-spot suppression portion arbitrary laser illumination system, but a cavity in which an arbitrary phase and amplitude component 3 is directly embedded in the laser illumination device. The inner spot suppresses part of the arbitrary phase laser illumination device. Similar to the principle of the above-described out-of-cavity laser system, the gain source of the intra-cavity laser passes through at least one or more amplifications in the laser cavity, and after leaving at least one arbitrary phase and amplitude element, leaves the laser cavity. In the cavity, a part of the arbitrary laser illumination source is generated because it contains the resonance phenomenon of the resonance cavity, so the physical mechanism of generating part of the arbitrary laser is different from that outside the cavity. The phase and amplitude distribution of some of the arbitrary lasers on the spatial axis and the time axis also differs due to resonance. As shown in Fig. 10, the spot suppression laser illumination device 7 includes an excitation body 71, a gain medium 72, an arbitrary phase and amplitude element 73, and a high reflection mirror 75. Wherein, after the excitation body 71 supplies energy to the low-level electrons to become high-level electrons, the pre-gain laser beam LS1 is emitted toward the gain medium 72, so that the pre-gain laser beam LS1 passes through the gain medium 72 to form a gain laser. Beam LS2. The gain medium 72 has a highly reflective surface 721 and an anti-reflective surface 722. The highly reflective surface 721 has good light reflection characteristics, and the anti-reflective surface 722 has no light reflection characteristics. The excitation body 71 drives the pre-gain laser beam LS1 into the highly reflective surface 721, so that after the gain, the laser beam LS2 is reflected multiple times through the gain medium 72 to obtain sufficient amplification, and the gain is reflected by the anti-reflective surface 722. Beam LS2. Alternatively, the exciter 71 can be replaced with other semiconductor laser or electron hole injection. 71 can also be an electrical excitation element, a photoexcited element, or a chemically active element.

After the gain, the laser beam LS2 radiates from the anti-reflective surface 722, passes through the arbitrary phase and amplitude element 73 and the high mirror 75, and finally passes the gain-reduced post-reduction laser beam LS2 to the spot to suppress the thunder through the emission port 76. The illumination device 7 is externally emitted. Among them, any The phase and amplitude element 73 is interposed between the gain medium 72 and the high mirror 75, and is passed by the gain laser beam LS2 emitted by the gain medium 72. The arbitrary phase and amplitude elements 73 are preferably phase-type arbitrary phases and Any phase and amplitude element of the amplitude element or the scattering sub-type, the arbitrary phase and amplitude element 73 can have a small angle of approximately ±0 degrees to ±5 degrees (compared to the vertical direction of the laser beam LS), and can even extend to nearly ±90 Degree, in which each angle has different suppression spot characteristics. After the pre-gain laser beam LS1 is emitted from the laser diode 71, it passes through the gain medium 72, the arbitrary phase and amplitude element 73, and the high mirror 75, and finally passes through the emission port 76 toward the spot to suppress the laser illumination device. 7 external launch. In this way, through any of the foregoing phase and amplitude elements 73, the laser spot noise in the laser beam can be effectively reduced, so that the spot suppression laser illumination device of the present invention is more capable than the conventional laser illumination device. Effectively suppresses laser spot noise.

In order to make the effect of the present invention more apparent, it is preferable to use the voice coil motor 74 to swing the arbitrary phase and amplitude element 73 back and forth, and the direction of the swing is nearly orthogonal to the direction of the post-gain laser beam LS2. In addition, it should be understood that those skilled in the art should of course understand that the voice coil motor 74 is used as a swinging element. However, other swinging elements may be used to achieve the same or similar to the voice coil motor 74 when actually implementing the present invention. The swinging effect is not necessarily limited to the use of the voice coil motor 74, and the voice coil motor 74 herein is merely an example of an embodiment and not a limitation, and is described herein. In addition, regarding the effect of the voice coil motor 74 on the spot suppression effect, please refer to FIG. 2 and the above related description, and details are not described herein again. In addition, preferably any phase and amplitude element 73 can reflect a portion of the arbitrary laser beam to the gain medium 72 to disturb the temporal and spatial phase and amplitude distribution of a portion of the arbitrary laser, thereby enhancing part of the arbitrary laser spot. The ability to suppress.

Please refer to FIG. 11, which is a ninth embodiment of the present invention having any phase. Schematic diagram of the internal structure of a portion of an arbitrary laser illumination device. As shown in FIG. 11, a plurality of arbitrary phase and amplitude elements 73 may be included between the gain medium 72 and the high mirror 75 (or any arbitrary phase and amplitude elements may be added to the original arbitrary phase and amplitude elements and high mirrors). The laser beam LS is caused to traverse the arbitrary phase and amplitude elements to greatly enhance the suppression of the spot, and the principle is similar to that described in FIG. 5 and the fourth embodiment described above. Among them, each of the arbitrary phase and amplitude elements 73 can be combined with the voice coil motor 74 to perform the swing lifting spot suppression effect.

Please refer to FIG. 12, which is a schematic diagram showing the internal structure of a laser illumination device having arbitrary phase and amplitude elements according to a tenth embodiment of the present invention. As shown in Fig. 12, a focusing lens 77 is disposed between the gain medium 72 and the arbitrary phase and amplitude element 73, so that the post-gain laser beam LS2 penetrates the focusing lens 77 to increase the beam size of the incident phase element to enhance the spot. Suppress the effect and obtain a point source of illumination.

It is worth noting that one of the features of the present invention is that even if any phase and amplitude components are embedded in the laser illumination device, the characteristics of the conventional laser light can be maintained, such as narrow line width characteristics, Gaussian propagation characteristics, and excellent Focusing ability, small divergence angle, long-distance propagation characteristics, even adding a light conversion element between the gain medium 72 and any phase and amplitude element 73, the characteristics of the laser light can be well maintained, wherein the light conversion element is preferably non- Linear or linear component. Please refer to FIG. 13, which is a schematic diagram showing the internal structure of a laser illumination device after adding a light conversion element device according to an eleventh embodiment of the present invention. As shown in Fig. 13, a light conversion element 9 is added between the gain medium 72 and an arbitrary phase and amplitude element 73, and the light conversion element 9 is traversed by the gain laser beam LS2 emitted from the gain medium 72, so that the gain is followed by a thunder. The beam LS2 becomes passing light The laser beam LS3 after the conversion of the component device. Preferably, the optical conversion component 9 can be a double frequency component, a sum frequency component, a difference frequency component, a multiple frequency component or another conversion component, so that the frequency/wavelength of the laser beam LS3 after passing through the optical conversion component device is change. In this way, the spot suppression effect of the present invention can be applied to a variety of different occasions, for example, in the case of infrared light laser or visible light laser, so that the infrared light, visible light or other characteristic laser can have the characteristics of reducing the spot. . Wherein, the aforementioned light conversion element is preferably KTP crystal (KTiOPO4), magnesium oxide lithium niobate crystal (MgO: LiNb3), magnesium oxide lithium niobate (MgO: LiTaO3) crystal, BBO crystal or other high efficiency light. Convert the crystal.

Please refer to FIG. 14, which is a schematic diagram showing the internal structure of a portion of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to a twelfth embodiment of the present invention. As shown in FIG. 14, the light conversion element 9 between the gain medium 72 and the arbitrary phase and amplitude element 73 may be plural, and the gain rear laser beam LS2 is converted into the fundamental frequency laser beam through the light conversion elements 9. The LSA and the wavelength-converted laser beams LSB, LSC enable arbitrary phase and amplitude elements 73 to be spot-suppressed for the fundamental-frequency laser beam LSA and the wavelength-converted laser beams LSB, LSC.

Please refer to FIG. 15, which is a schematic diagram showing the internal structure of a portion of an arbitrary laser illumination device having an arbitrary phase and amplitude element according to a thirteenth embodiment of the present invention. As shown in Fig. 15, a focusing lens 77 is disposed between the light converting element 9 and the arbitrary phase and amplitude element 73, so that the post-gain laser beam LS2 penetrates the focusing lens 77 to enhance the beam size of the incident phase element to enhance spot suppression. The effect, and the point of illumination of the point of illumination can be obtained.

In addition, in the above embodiments, an optical diffuser film element, a diffuser optical element (DOE), and a microlens may be disposed. (microlens) is inside the resonant cavity, that is, between the gain medium 72 and any phase and amplitude element 73, to achieve a spot suppression gain effect on the fundamental frequency and the light conversion source at the same time.

Alternatively, any of the above-described arbitrary laser illumination devices having any phase and amplitude components can be applied to the laser illumination system. For example, any phase and amplitude elements are placed between the laser illumination devices of embodiments 8 through 13 and the projection target such that the arbitrary phase and amplitude elements are traversed by the laser beam. In this way, part of the arbitrary laser has a phase and amplitude distribution on the time axis and the spatial axis, and has spot suppression capability. Through linear and nonlinear wavelength conversion, a novel part of the light conversion can be obtained. Laser, this part of the arbitrary laser has the ability to suppress the spot. In still another example, a laser illumination system having a portion of any laser illumination device of any phase and amplitude component further includes one or more light conversion elements. A plurality of partial arbitrary lasers are passed through a light conversion element or a plurality of light conversion elements to form a part of an arbitrary laser light source of a novel light conversion wavelength, and any part of the laser has the suppression capability of the spot, and the spot of any part of the laser The ability to suppress is thus enhanced.

Please refer to FIG. 16, which is a laser characteristic diagram of a part of any laser illumination device having arbitrary phase and amplitude components, wherein the data line D3 represents a general laser illumination device without any phase and amplitude components. , data line D4 represents a laser illumination device with static (non-swing) arbitrary phase and amplitude components, and data line D5 represents a laser illumination device with a voice coil motor swinging back and forth with arbitrary phase and amplitude components at a frequency of 130 Hz, data line For the Y axis of D3, please refer to the general laser output coordinate value on the right side. For the Y axis of data line D4 and D5, please refer to the arbitrary phase laser output coordinate value on the left side. As can be seen from Fig. 16, the arbitrary laser illumination device of the present invention having any phase and amplitude components, whether or not the voice coil motor is provided, The laser beam that is emitted can still maintain good laser light characteristics. In other words, since the laser beam of the present invention can maintain a divergence angle of a small angle after the incident of the arbitrary phase and amplitude components, it is easy to control the appearance of the laser beam without causing the laser illumination device to fail due to the excessive divergence angle. Maintain laser light characteristics.

Designing an element on an optical component that allows the phase and amplitude of the laser source to change its redistribution over the space coordinates and time coordinates. For any phase and amplitude diffusing film element, the structural pattern of the laser beam can be a periodically distributed structural pattern or a partially periodic distribution pattern, or an arbitrarily distributed pattern and combinations thereof. Designing the structure pattern on any phase and amplitude component can be a nanometer to micrometer structure pattern, a smaller pattern structure or a larger pattern structure, such as laser irradiation in FIG. The far-field distribution diagram of the phase and amplitude components, the arbitrary phase and amplitude components passing through the pattern structure of about 10um to about 150um, the laser divergence angle is less than ±0.5 degrees, and the intensity (amplitude) is re-created on the space coordinate axis. distributed. When the laser beam passes through the arbitrary phase and amplitude elements to generate basic optical phenomena such as interference, refraction, diffraction, scattering or diffusion, and after the penetration, the element re-creates a new coordinate on the space coordinate axis and the time coordinate. The phase and amplitude distribution, and then adjust the size of the pattern structure according to the characteristics of some of the laser light sources required by the application to meet the requirements of some laser light source divergence angle and spot suppression characteristics.

Additionally, the light source of any of the laser illumination systems and devices of the present invention may have the following characteristics: a.) It may have partial temporal homology, which may have partial time non-coherence characteristics. b.) It may have some spatial coherence and may have the characteristics of partial spatial non-coherence. c.) Projection to smooth and rough surfaces with time-averaged and spatially averaged spot suppression. d.) its spatial average energy distribution or The intensity distribution can have a highly uniform nature. e.) Its spatial average energy distribution or intensity distribution may have a highly non-uniform nature. f.) Its spatial instantaneous energy distribution or intensity distribution may have a highly uniform nature. g.) Its spatial instantaneous energy distribution or intensity distribution may have a highly non-uniform nature. h.) Its spatial propagation can have the characteristics of mean Gaussian propagation. i.) Its spatial propagation may have the characteristics of average non-Gaussian propagation. j.) The spectral line width can have the characteristics of a narrow line width and can have a wide line width. k.) Its projection to the target may have a small angle characteristic and may have a high degree of collimation. l.) Its projection to the target can have large angle characteristics and can have a large area. m.) It is used to focus on characteristics with a time average small size. n.) It is used to diverge the characteristics of time-averaged large size. o.) Any part of this laser source can have continuous wave characteristics. p.) Any part of this laser source can have the characteristics of quasi-continuous wave. q.) Any part of this laser source can have the characteristics of pulse wave.

In summary, the present invention directly places any phase and amplitude components in the laser illumination device to achieve the effect of suppressing the laser spot directly by the emitted laser without setting the spot outside the laser illumination device. Suppression device. Even, by using a non-linear element or a linear element device in a near-infrared light laser cavity to generate a visible light laser output, and by oscillating any phase and amplitude element, the laser beam noise of the fundamental frequency and the wavelength-converted light can be simultaneously reduced. . In addition, the present invention can be extended for laser spot suppression of higher harmonic conversion. If the laser of the present invention is focused at a large angle, the spot of the laser can be focused to a small size, which can be of a wavelength level, a half wavelength class or less.

In summary, the laser illumination system and apparatus of the present invention having arbitrary phase and amplitude components can not only effectively reduce the laser spot noise but also maintain the characteristics of the laser beam, and the emission of the present invention can be small angle divergence and Large angle divergence, so the laser beam propagation distance can be It is a few meters to several kilometers or more and is suitable for use in liquid crystal germanium (LCoS), digital light processor (DLP) or small spot microelectromechanical systems (MEMS), or other scanning systems.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

7‧‧‧Spot suppression laser lighting device

71‧‧‧Excited body

72‧‧‧ Gain medium

721‧‧‧Highly reflective surface

722‧‧‧Anti-reflective surface

73‧‧‧Arbitrary phase and amplitude components

74‧‧‧ voice coil motor

75‧‧‧High Mirror

76‧‧‧ Launch port

LS1‧‧‧Gas Front Laser Beam

Laser beam after LS2‧‧‧ gain

Claims (26)

A partial laser illumination device having an arbitrary phase and amplitude component, comprising: a laser cavity; a gain medium; an excitation body exciting the gain medium electrons from a low energy state to a high energy state; a gain beam emitted by the gain medium and a laser beam passing therethrough; and an arbitrary phase and amplitude component interposed between the gain medium and the high mirror, and the laser beam emitted by the gain medium passes through the gain; The gain medium and the arbitrary phase and amplitude elements are disposed in the laser cavity. An arbitrary laser illumination device according to the first aspect of the patent application, wherein the arbitrary phase and amplitude component is a phase type arbitrary phase and amplitude element or a scattering subtype arbitrary phase and amplitude element or a combination thereof, wherein the arbitrary phase and amplitude element It can also be a diffusing film element, a diffractive element, a microlens element or a combination thereof. An arbitrary laser illumination device according to the first aspect of the patent application scope further includes a swinging element that swings the arbitrary phase and amplitude components back and forth, the direction of the swing being approximately orthogonal to the direction of the laser beam after the gain or One of the angles of about 0 to 45 degrees swings. An arbitrary laser illumination device according to the third aspect of the patent application, wherein the oscillating member is selected from one of a voice coil motor, a magnetic component, an electric component, a photodynamic component, an acoustic component, and a piezoelectric component or combination. The optional arbitrary portion of the laser illumination device of claim 1, wherein the gain medium has a highly reflective surface and an anti-reflective surface, the excitation body driving the laser beam into the highly reflective surface, and The anti-reflective surface emits the laser beam after the gain. An arbitrary laser illumination device according to the first aspect of the patent application, further comprising: one or more light conversion elements between the gain medium and the arbitrary phase and amplitude elements, such that the light conversion elements are emitted by the gain medium After the gain, the laser beam passes through. A portion of any of the laser illumination devices of claim 6 includes a focusing lens between the light converting elements and the arbitrary phase and amplitude elements such that the laser beam penetrates the focusing lens. A portion of any of the laser illumination devices of claim 6 wherein the optical conversion component is selected from the group consisting of linear or non-linear components, wherein the optical conversion component can be a double frequency component, a harmonic component, a difference frequency component, or other conversion. element. According to part of the arbitrary laser illumination device of claim 1, wherein the arbitrary phase and amplitude elements have an angle with a vertical direction of the laser beam after the gain, the angle being selected from the range of approximately ±0 degrees to approximately ±90 degrees. One of them. The optional arbitrary portion of the laser illumination device of claim 1 further includes one or more additional phase and amplitude elements, and the additional phase and amplitude elements are located between the gain medium and the high mirror, such that The laser beam penetrates the applied arbitrary phase and amplitude elements. A portion of any of the laser illumination devices of claim 1 further includes a focusing lens between the gain medium and the arbitrary phase and amplitude elements such that the laser beam penetrates the focusing lens. A portion of any of the laser illumination devices of claim 1 wherein the arbitrary phase and amplitude elements reflect a portion of the gained laser beam to the gain medium. A portion of any laser illumination system having any phase and amplitude components, comprising: a laser illumination device that emits a laser beam to a projection target; an arbitrary phase and amplitude component interposed between the laser illumination device and the projection target and traversed by the laser beam; wherein the arbitrary phase is The amplitude element is static to reduce the spot. A portion of any of the laser illumination systems of claim 13 wherein the arbitrary phase and amplitude elements are phase-type arbitrary phase and amplitude elements or scattering sub-type arbitrary phase and amplitude elements or combinations thereof, wherein the arbitrary phase and amplitude elements It can also be a diffusing film element, a diffractive element, a microlens element or a combination thereof. According to part 13 of the patent application scope, any of the laser illumination systems further includes a swinging element that swings the arbitrary phase and amplitude elements back and forth, the direction of the swing being approximately orthogonal to the direction of the laser beam or about 0. Swing to one of the angles of 45 degrees. An optional arbitrary laser illumination system according to the fifteenth aspect of the patent application, wherein the oscillating member is selected from one of a voice coil motor, a magnetic component, an electric component, a photodynamic component, an acoustic component, and a piezoelectric component or combination. An optional arbitrary laser illumination system according to claim 13 further comprising a diverging lens and a focusing lens, the diverging lens being located between the arbitrary phase and amplitude element and the laser illumination device, the focusing lens being located at the arbitrary Between the phase and amplitude elements and the projection target, the laser beam penetrates the diverging lens and the focusing lens. A portion of any of the laser illumination systems of claim 13 wherein the arbitrary phase and amplitude elements have an angle with a direction perpendicular to the laser beam, the angle being selected from the group consisting of approximately ±0 degrees to approximately ±90 degrees. One. According to part 13 of the patent application scope, any laser illumination system further includes one or more In addition to any phase and amplitude elements, the additional phase and amplitude elements are located between the arbitrary phase and amplitude elements and the target, such that the laser beam penetrates the applied arbitrary phase and amplitude elements. According to part 13 of the patent application scope, any of the laser illumination systems further includes one or more additional laser illumination devices, and the laser illumination devices and the additional laser illumination devices emit the laser light to the cross dichroic prism ( Cross dichroic prism) to produce a multi-wavelength arbitrary laser source such that the multi-wavelength arbitrary laser source penetrates the arbitrary phase and amplitude elements and is projected onto the projection target. A portion of any of the laser illumination systems of claim 13 further comprising one or more light conversion elements positioned between the laser illumination device and the arbitrary phase and amplitude elements such that the laser The light beam penetrates the light conversion elements. An arbitrary laser illumination system according to part 13 of the patent application scope further includes one or more light conversion elements between the arbitrary phase and amplitude elements and the projection target such that the laser beam passes through Through the light conversion elements. A portion of any of the laser illumination systems of claim 13 wherein the arbitrary phase and amplitude elements reflect a portion of the laser beam to the laser illumination device. A portion of any laser illumination system having any phase and amplitude components, comprising: a laser illumination device that emits a laser beam to a projection target; a plurality of optical conversion modules, wherein each of the optical conversion modules includes an arbitrary a phase and amplitude component and a light conversion component interposed between the laser illumination device and the projection target and traversed by the laser beam. A portion of any laser illumination system having any phase and amplitude components, comprising: An arbitrary laser illumination device having any phase and amplitude component as claimed in claim 1; an arbitrary phase and amplitude component interposed between the laser illumination device and the projection target and traversed by the laser beam . According to part of the arbitrary laser illumination system of claim 25, one or more light conversion elements are further included.